Filling device



H. FILSS FILLING DEVICE Jan. 4, 1938.

Filed April 20, 1935 Patented Jan. 4, 1938 FILLING DEVICE Hermann Filss,Worms-on-the-Rhine, Germany,

assignor to Enzinger-Union-Werke Wcrms-on-the-Rhine, Germany, a GermanCOIIIPBJIY Application April 2 q,.,1935, Serial No. 17,510 In GermanyApril 24, 1934 4 Claims.

This invention relates to a filling device for counter-pressure fillingmachines for bottles and other vessels of the type in which the liquidcolumn contained in the return air pipe is fed back into the vessel orbottle still pressed against the said filling device.

In the case of filling machines of this type it is of paramountimportance, particularly with sensitive liquids, that the liquid whichhas risen in the return air pipe be fed back into the bottle pressedagainst the filling device, as slowly and as free of shock as possiblein order that the liquid contained in the bottle is not disturbed.

Attempts have been made to do this by the return air pipes being e. g.provided with a narrower portion so that the velocity of discharge wasreduced correspondingly. The same efifect can be attained when insteadof the return air pipe the feed air pipe is throttled.

Contractions of the cross section of this class however result invarious inconveniences; they are difficult to clean and moreover liableto obstruction.

There further exists a type of filling device in which not the wholecolumn of liquid contained in the return air pipe is returned into thebottle pressed against the said device but only that portion of theliquid which is below the cock plug. Finally in another type of fillingdevice already existing a connection is established in the fillingposition between the return air and liquid pipes, while in other fillingdevices of a similar type having such connecting ducts the liquid raisedin the return air pipe is not dis charged into the bottle pressedagainst the device but into the subsequent bottle.

The subject matter of the present invention is distinguished from thetypes of filling devices already known by the fact that the feed andreturn air pipes preserve their full cross section over their wholelength and that the liquid which had risen within the return air pipeabove the cock plug is not returned directly through the return air pipebut through the liquid pipe into the vessel still pressed against thefilling device. For this purpose the cock must be adapted to occupy aspecial position, and provided with a short transverse duct in the plugwhich duct connects the return air pipe with the liquid pipe. Thisarrangement not only does away with the inconveniences above referred tobut also affords the advantage that the liquid is not discharged withinthe narrow neck portion of the vessel to be filled but close to thebottom thereof. In this way the liquid raised in the return air pipe isallowed to escape tranquilly within and above the cock plug since it isopposed by a certain resistance due to the liquid already contained inthe bottle. On the other hand the liquid contained in the return airpipe below the cock plug will, in the closed position of the cock, flowback into the bottle since in this position the feed air, return air andfilling pipes are connected with one another in a Well-known way by across duct. 1

The accompanying drawir g represents an em bodiment of the invention byway of example and shows in Fig. 1 a longitudinal section through thefilling device with a bottle pressed against the 15 latter,

Fig. 2 a section through the liquid duct, and

Fig. 3 a section through the return air duct in the plane of the ductconnecting the return air pipe with the liquid duct. 20

All these figures show the filling device in the position in which theliquid raised in the return air pipe is caused to fiow back into thevessel pressed against the device. Into the body I of the fillingdevice, which is secured to the con- 25 tainer 3 for the liquid, thereis fitted the cock plug 2. The feed air pipe is designated by 4, thereturn air pipe by 5 and the liquid pipe by 6. The duct 1 disposed inthe plug 2 connects-the return air duct 5 with the liquid duct 6. The 30bottle is designated by the numeral 8.

The modus operandi is as follows:

After the bottle has been put under tension in a well-known manner byfeed air and has been filled by the liquid duct being opened, the liquid35 rises, as is known, into the return air pipe or duct 5 until it hasarrived at the level of the liquid contained in the container 3. Duringturning of the cock plug 2 the liquid duct 6 is closed while the returnair duct 5 remains in its open posi- 40 tion. In order that thiscondition may be attained the corresponding duct in the said plug 2 isenlarged in a fan-like manner, as is shown by Fig. 3, while in thebottom portion of the said plug the connecting duct 1 establishes aconnec- 45 tion between the return air duct and liquid duct respectivelywithin the cock plug. While this is done, at the same time the feed airduct 4 is opened. In this position of the said cock plug 2 anequilibrium will be established between the 50 pressure still prevailingwithin the container 3 and that in the bottle 8, still pressed againstthe filling device because the air contained in the said bottle abovethe level of the liquid therein is allowed to escape into the container3 through 5 the feed air pipe 4 and the return air pipe 5 can now beemptied within and above the cock plug 2.

What I claim as my invention, and desire to secure by Letters Patent, is

1. Counter-pressure filling apparatus including a liquid pipe, a returnair pipe, and a plug cock interposed in and controlling said pipes, saidplug cock having within its plug a duct for establishing connectionbetween the parts of said liquid pipe above and below the cook, a secondduct for establishing connection between the parts of said return airpipe above and below the cock, and a third duct positioned to establishcommunication between the part of said return air pipe above the cockwith the part of said liquid pipe below it at a time during the closingof the cock when the lower parts of said pipes are cut off from theirupper parts and while a filled vessel is still in position.

2. In a filling device, a container containing the liquid to be filledinto a vessel, an air return pipe adapted to discharge liquid thereininto the said vessel while the same is still pressed against the saiddevice for the filling operation, a liquid pipe extending almost to thebottom of said vessel during filling and discharging thereinto, a cockplug having ducts controlling said air return pipe and said liquid pipe,said cock plug having a duct adapted to connect the part of said airreturn pipe above said plug with the liquid duct comprised in the saidplug when the plug closes the liquid pipe.

3. In a filling device, a container containing the liquid to be filledinto a vessel, a feed air pipe adapted to put the said vessel underpressure, an air return pipe adapted to discharge liquid therein intothe said vessel while the same is still pressed against the said devicefor the filling operation, a liquid pipe extending almost to the bottomof said vessel during filling and discharging thereinto, a cock plugadapted to open and close the said feed .air pipe and the said liquidpipe, said plug also having a duct adapted to connect the part of saidair return pipe above said plug with the portion of the said liquid pipebelow the said plug when the plug closes the said liquid pipe.

4. In a filling device, a container containing the liquid to be filledinto a vessel, a feed air pipe adapted to put the said vessel underpressure, an air return pipe adapted to discharge liquid therein intothe said vessel while the same is still pressed against the said devicefor the filling operation, a liquid pipe extending almost to the bottomof said vessel during filling and discharging thereinto, a cock plugadapted to open and close the said feed air pipe and the said liquidpipe, said plug also having a duct with a fan shaped enlargement,adapted to connect the part of said air return pipe above said plug withthe portion of the said liquid pipe below the said plug when the plugcloses the said liquid pipe.

HERMANN FILSS.

